brockway



PATENTED PEB. 18,` 1868.

E. BROCKWAY.

BOILER FEEDER.

3 SHEETS-SHEET 2.

No. 74,659. EATENTEE EEB. 18, 1868.. E. EEOCKWAY. EOI'EEE FEEDER.

3 SHEETS-SHEET 3v m'neffes I I /9 l Y .ef/z ,fait

@eine taies eztent ffice.

EDWIN BnccKWAY, or H'Avnnsreaw, NEW YORK.

Lettere Patent No. 74,659, dated Feln'uary 18, 1868.

IMPROVEMENT IN BOILERFBEDRS.-

TO ALL WHOM IT MAY4 CONGERN:

Be it known that I, EDWINBROCKWAY, of Haverstraw, Rockland county, NewYork, have invented a new and useful Boiler-Feeder; and I do herebydeclare that the following is a full, clear, and exact description Qi'the same, reference being had `to the accompanying drawings.

This boiler-feeder is 1i' the class that consists oi' a chamber orchambers that are alternately iilled with water at atmosphericor otherpressure, and then emptied of their contents into the boiler byestablishing a connection with the saine, andlallowing'the water to owthither of its own gravity, independently of the pressure of steam. Inthis machine no valves are operated by the pressureoilstcam or column ofwater', but by' the vibrations of a rock-shaft, towhich two'water-vessels are. attached in such positions that the alternatefilling and emptying of these vessels (which are in water-connection atthe bottom with two water-chambers employed to'feed the boiler) rocksthe shaft to-and fro, operating in conjunction the cold-:water inlet-ppeof one waterchamber, also its stea`n1-inlet pipe and the hot-waterVoui:let pipe ofthe other chamber, thereby discharging the contents o'i'one chamber through the hot-water outlet-pipe into the boiler, while theother chamber receives a. supply of' freshwater (that is,feedwater)ii`rcxri the cold-waterinlet-pipe, the entrance of said coldwater being hastened by meeting thc steam from the steamlinlet pipe, andcondensing the lsteam, and rushing into the vacuum formed by said'condensation in the feeding-chamber. This'vacuum enables theboiler-feeder to draw its own supply of water to some elevation fromacistern or well. The proper movements ofthe inlet and outletvalves aremadefby the above-mentioned rock'shaft, and will be understood byreference' to the drawings. The waterwessels attached to the rock-shaftowe their motions to their alternate ydifferences in weight, which aredue -to the fece thaeeneis connected toA onewaterchambernndthrrether-to-tireotiier water-chamber. Tow, of these twochambers, one is always full Vor filling, while the other is alwaysempty Vor emptying, andas the rocking water-vessels share in the fillingand emptying these chambers, (being connected at their lower ends to thechambers by the rock-shaft which is hollow, but has a diaphragm at itsmiddle, to prevent connection between the two chambers, and at theirupper ends by the jointed connections d d, shown in the draw-ing) eachof them becomes alternately heavier than the other, and reverses theposition of all tbevalves, thus connccti'ng'one chamber at a time withthe-boiler to discharge its contents,V while the other is receivingfeed-wate1z p It will be observed that all the steam usedto operate thismachine imparts its heat directly to thewater, which is immediatelyreturnedto the boiler, thereby losing none of the elect 'of the fuelemployed to heat the water in the boiler `any more than if the watercould run directly into the boiler from its rescrvoir. Below is adescription of the drawings.`

A B are the 'water-chambers; C D are the water-vessels on rock-shaft; Eis the rock-shaft, connected at a b to levers and rods for operating thevn lves ci the chambers; G is colrl-water pipe, branching oil' to eachchamber A B; His steam-pipe from boiler, branching in similar manner;- Iis the hot-water pipe, which carries the feed-water and condensed steamfromeac'h chamber alternately to the boiler; c c nre thecold-water'inlet-valvess eZ d are the steam-inlet valves; e e are thehot-water outlet-valves; ff are connections from the topsoi' the vesselsC-D to the chambers, ,to facilitate .circulation'of water or steam inthem vg g are rose-jetfnto throw the cold ywater-entering the chambersinto better contact with the steam; 7i h are the steam-pipes, carried upto near the tops of the chambers; K is a. device ntthe end Vo thestcanbpipe H, where it penetrates Vthe boiler, designed both to keepsteam from entering the pipe when the water in the boiler is highenough, and also to'keep scum, &c., from passing through the pipe to theboiler-feeder, when the same is in operation, receiving steamirom theboiler. The steam-pipe Hiterniinates at' the proper level of water inthe boiler. Whenever, therefore,the feedersu'pply raises the water intheboiler to that level, the month of. pipe H isv covered with water,and the :boiler-V feeder stops acting at once, because the presence ofsteam to till each of the rockng-vessels alternately, to make it lighterthan the opposite vessel, is necessary to maintain the action ofthevalves. To keep the scum on the surface of the water from entering thcpipe H, a guard, K, surrounds it, penetrating the water a few inches,

when at its proper level, and perforated with holes for tho-admission o'steam at some distance vabove the surface of the water, thereby avoidingthe rush of scum to the open pipe, and securing the stoppage oi' .theflow of steam when the -watcr rises to its proper level.

Having thus described thcconstruction and operation of this boiler-feed,what I claim, and desire to secure by Letters Patent, is-

1. The arrangementof the connecting-devices a, I1, and E, as shown anddescribed.

2. The guard K, as shown and described on'pipc H, to keep scrum fromentering steam-pipe.

EDWIN. BROGKWAY.

Witness es.:

W. H. Donn, v

